Life is not the unique property of Earth. Nor is life in the shape of human beings. Life takes many forms on other planets and far stars, forms that would seem bizarre to humans, as human life is bizarre to other life-forms.
Because we remember pain and the menace of death more vividly than pleasure, and because our feelings toward the beneficent aspects of the unknown have from the first been captured and formalised by conventional religious rituals, it has fallen to the lot of the darker and more maleficent side of cosmic mystery to figure chiefly in our popular supernatural folklore.
After man there would be the mighty beetle civilisation, the bodies of whose members the cream of the Great Race would seize when the monstrous doom overtook the elder world. Later, as the earth's span closed, the transferred minds would again migrate through time and space -- to another stopping place in the bodies of the bulbous vegetable entities of Mercury. But there would be races after them, clinging pathetically to the cold planet and burrowing to its horror-filled core, before the utter end.
The very fact that religions are not content to stand on their own feet, but insist on crippling or warping the flexible minds of children in their favour, forms a sufficient proof that there is no truth in them. If there were any truth in religion, it would be even more acceptable to a mature mind than to an infant mind--yet no mature mind ever accepts religion unless it has been crippled in infancy.
You see them? You see the things that float and flop about you and through you ever moment of your life? You see the creatures that form what men call the pure air and the blue sky? Have I not succeeded in breaking down the barrier; have I not shown you worlds that no other living men have seen?
The human race will disappear. Other races will appear and disappear in turn. The sky will become icy and void, pierced by the feeble light of half-dead stars. Which will also disappear. Everything will disappear. And what human beings do is just as free of sense as the free motion of elementary particles. Good, evil, morality, feelings? Pure 'Victorian fictions'. Only egotism exists.
Bunch together a group of people deliberately chosen for strong religious feelings, and you have a practical guarantee of dark morbidities expressed in crime, perversion, and insanity.
Despite my solitary life, I have found infinite joy in books and writing, and am by far too much interested in the affairs of the world to quit the scene before Nature shall claim me.